Some questions.
1 - The cold sorceress should use blizzard? Is it better than frozen orb against bosses?
2 - I have always used spirit on my sorceress, but this requires a lot of strenght, and a lot of dex if you want to max block (i usually don't). What about using something else? Rhyme is pretty good at low levels, but i'd really like to increase my survivability. First idea could be sanctuary runeword (on the cold soso, as she has lower resistance), and the second idea (mostly for the fire sorceress) could be moser's, maybe socketed with 2 rbfs. I could go for max block with both of these, with a small cost in life, as i would need much less strenght. And i wouldn't need to um my items
3 - Would it be better to reset my first sorceress to a light one? I have infinity on her merc. At least untill i can get my hands on a fathom
4 - If i should go on with the cold soso, and without maxing blizzard, what should i do with the rest of the skill points? I'm using enchant on my merc, but it's not really that effective

An interrogation : what is the purpose of FCR with a Frozen Orb sorc ; FO has a casting delay of 1 sec and, imho, casting delay is not modified by FCR.

Click to expand...

It is not... my 10 fcr rings are only to teleport faster, and only 'caus i still don't have better option (now 1 is a soj, actually).

Anyway, my real question is about the shield for the tal rasha's fire sorc.

Tal set is not the best option for a sorceress, but gives a lot of magic find, and running kurast chests, it's reaaaally nice

Some possible options:
Rhyme runeword - nice adds, but i'd love a higher chance to block... what could be a good base?
Moser's - Decent chance to block (and faster block rate), decent res and two sockets... 2 fire rbf? Or 2 jah to get 100 life? Or 2 ber for a 16% dr?
Stormshield - Nice nice nice chance to block and damage reduction. Still gives no fire and poison resists (tal rasha gives small bonuses on pres too). Still, the worst thing is the high strenght req
Spirit - As always, great shield, but low chance to block and high strenght (no chance to get max block)
Phoenix - Just like spirit, requisites and chance to block makes it a bad choice, but redemption and -28% enemy fire res are HUGE adds

First of all, dont use fcr above 63 if you use blizz or FO. Only if you want a faster teleport. Imo, 63 is enough.
And, this setup:
shako - viper - oculus - spirit - arach - magefist - wartraveler - mara - 2x10 fcr rings
Gives you 30+30+35+20+20+20 = 155fcr.
Which is a waste since the breakpoints are at 63, 105 and 200.

And to your questions in order!

1.
The real difference between FO and Blizz. Is that FO allows for a second element, or maxed ES.
Blizz does alot more damage, and even if its less reliable and a bit slower, it does alot more dmg.
Against bosses, not so sure.
But its hard to hit bosses with the best FO effeciency.

2.
Depending on what you want to do, several options comes to my mind.

The best shield for resistances are Sanctuary. And this rw also allows for easy achievable max block. Requires only a 3os shield.

Another good shield for blocking is Mosers Blessed Circle, with its 2 sockets its highly customizable. Gives 25@res and nice block. Low str req!

The best shield imo for a fire sorc, if you can afford it. Is Phoenix.
The aura makes the sorc a whole new experience. It adds a ton to survivability, be sure to not use Natures peace though.

Well im trying to reduce the differences to something comparable, so if we forgo upgradng the mosers(might as well get a stormshield in that case as it beats them both imo) it comes down to 81 dex at lvl 90 or